Lieutenant Myles McCarthy is originally from Southampton, Massachusetts. He graduated from the United States Coast Guard Academy in 2012 with a Bachelor of Science degree in Mechanical Engineering. Following graduation, LT McCarthy served aboard USCGC Diligence (WMEC 616), a 210-foot medium endurance cutter, home-ported in Wilmington, North Carolina. From 2012 to 2014, he served as Assistant Navigator, Combat Information Center Officer, and the Support Department Head, conducting counter-drug, alien migrant interdiction, and living marine resources enforcement operations along the Eastern Seaboard and in the Caribbean.

From 2014 to 2016, LT McCarthy served as the Operations Officer aboard USCGC Spar (WLB 206), a 225-foot sea-going buoy tender home-ported in Kodiak, Alaska, where he serviced aids to navigation, conducted maritime law enforcement, and responded to search and rescue cases throughout the Gulf of Alaska and Bering Sea. In July 2016, he reported to the United States Coast Guard Academy Professional Maritime Studies branch, where he currently serves as a Nautical Science II instructor.

LT McCarthy's awards include the Coast Guard Commendation Medal, the Commandant's Letter of Commendation, and various other unit and team awards. LT McCarthy lives in Oakdale, Connecticut with his wife Katelyn and three children.